java swing中在jTable中添加多个复选框的方式如下:
import java.awt.Componentimport java.awt.event.ActionEvent
import java.awt.event.ActionListener
import javax.swing.*
import javax.swing.table.*
public class MyFirstJFrame extends JFrame {
// 作为测试的main方法
public static void main(String[] args) {
new MyFirstJFrame().setVisible(true)
}
/**
* 构造方法
*/
public MyFirstJFrame() {
InitialComponent()
}
/**
* 初始化组件的方法
*/
private void InitialComponent(){
// 设置窗体参数
// 设置布局模式
setLayout(null)
// 设置窗体大小
setSize(480, 360)
// 设置窗体居中(非常规方法)
setLocationRelativeTo(null)
// 关闭窗体退出程序
setDefaultCloseOperation(DISPOSE_ON_CLOSE)
// 初始化面板
panel = new JPanel()
panel.setSize(this.getWidth(), this.getHeight())
panel.setLocation(0,0)
panel.setLayout(null)
// 初始化表格
table = new JTable(new DefaultTableModel(new Object[][]{{"第一行"},{"第二行"},{"第三行"},{"第四行"}}, new String[]{"测试行1","测试行2"}){
/* (non-Javadoc)
* 重写方法,判断表单元格是否可编辑
* 可以通过row和column索引判断某一个单元格是否可编辑
* 此处设为都不可编辑
* @see javax.swing.table.DefaultTableModel#isCellEditable(int, int)
*/
@Override
public boolean isCellEditable(int row, int column) {
return false
}
})
// 开始向表格中添加复选框(注意:此示例较为简单,缺省很多判断,也没有动态代码支持)
// 通过设置列渲染
// 方法一:直接方式 使用TableColumn的setCellRenderer方法(推荐)
// 此方法可以设置某一列的渲染(即使用某一个组件--即控件来显示单元格数据)
table.getColumnModel().getColumn(1).setCellRenderer(new TableCellRenderer(){
/*(non-Javadoc)
* 此方法用于向方法调用者返回某一单元格的渲染器(即显示数据的组建--或控件)
* 可以为JCheckBox JComboBox JTextArea 等
* @see javax.swing.table.TableCellRenderer#getTableCellRendererComponent(javax.swing.JTable, java.lang.Object, boolean, boolean, int, int)
*/
@Override
public Component getTableCellRendererComponent(JTable table,
Object value, boolean isSelected, boolean hasFocus,
int row, int column) {
// 创建用于返回的渲染组件
JCheckBox ck = new JCheckBox()
// 使具有焦点的行对应的复选框选中
ck.setSelected(isSelected)
// 设置单选box.setSelected(hasFocus)
// 使复选框在单元格内居中显示
ck.setHorizontalAlignment((int) 0.5f)
return ck
}})
// 方法二:先设置列编辑器,然后设置单元格渲染
// 设置列编辑器
// 在以复选框为对象设置列编辑器时,必须保证该列能够被编辑,否则无法更改状态
// (此步骤可以省略,省略时不要忘记将列设为不可编辑)
// table.getColumnModel().getColumn(1).setCellEditor(new DefaultCellEditor(new JCheckBox()))
// 设置单元格渲染(这里是设置表格级别的渲染)
/*table.setDefaultRenderer(Object.class, new TableCellRenderer(){
@Override
public Component getTableCellRendererComponent(JTable table,
Object value, boolean isSelected, boolean hasFocus,
int row, int column) {
// 判断是否为需要渲染的列
if(column == 1){
// 和方法一基本一致
JCheckBox box = new JCheckBox()
box.setSelected(isSelected)
// 设置单选box.setSelected(hasFocus)
box.setHorizontalAlignment((int) CENTER_ALIGNMENT) // 0.5f
return box
}
// 如果不是需要渲染的列,封装文本域显示数据
return new JTextArea(value.toString())
}})*/
// 在多选是需要按住Ctrl键或者鼠标按住拖过连续的需要选中的行,应该给用户说明
// 第一种方法是被推荐的,因为它具有选中的高亮显示,界面能更加友好
table.setSize(panel.getWidth(),panel.getHeight() - 90)
table.setLocation(0, 0)
btn = new JButton("Test")
btn.setSize(80,40)
btn.setLocation((panel.getWidth()) / 2 - 40, panel.getHeight() - 80)
// 按钮点击时显示当前选中项
btn.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
for(int rowindex : table.getSelectedRows()){
JOptionPane.showMessageDialog(null, rowindex + " " + table.getValueAt(rowindex, 0))
}
}})
panel.add(table)
panel.add(btn)
this.add(panel)
}
// 定义一些必要的组件
private JPanel panel
private JTable table
private JButton btn
}
package p1import java.awt.Dimension
import java.awt.GridLayout
import javax.swing.JFrame
import javax.swing.JPanel
import javax.swing.JScrollPane
import javax.swing.JTable
import javax.swing.table.AbstractTableModel
public class TableDemo extends JPanel
{
private boolean DEBUG = true
public TableDemo ()
{
super (new GridLayout (1, 0))
JTable table = new JTable (new MyTableModel ())
table.setPreferredScrollableViewportSize (new Dimension (500, 70))
table.setFillsViewportHeight (true)
JScrollPane scrollPane = new JScrollPane (table)
add (scrollPane)
}
class MyTableModel extends AbstractTableModel
{
private String[] columnNames = { "First Name", "Last Name", "Sport", "# of Years", "Vegetarian" }
private Object[][] data = { { "Kathy", "Smith", "Snowboarding", new Integer (5), new Boolean (false) },
{ "John", "Doe", "Rowing", new Integer (3), new Boolean (true) },
{ "Sue", "Black", "Knitting", new Integer (2), new Boolean (false) },
{ "Jane", "White", "Speed reading", new Integer (20), new Boolean (true) },
{ "Joe", "Brown", "Pool", new Integer (10), new Boolean (false) } }
public int getColumnCount ()
{
return columnNames.length
}
public int getRowCount ()
{
return data.length
}
public String getColumnName ( int col )
{
return columnNames[col]
}
public Object getValueAt ( int row, int col )
{
return data[row][col]
}
public Class getColumnClass ( int c )
{
return getValueAt (0, c).getClass ()
}
public boolean isCellEditable ( int row, int col )
{
if (col < 2)
{
return false
}
else
{
return true
}
}
public void setValueAt ( Object value, int row, int col )
{
if (DEBUG)
{
System.out.println ("Setting value at " + row + "," + col + " to " + value + " (an instance of "
+ value.getClass () + ")")
}
data[row][col] = value
fireTableCellUpdated (row, col)
if (DEBUG)
{
System.out.println ("New value of data:")
printDebugData ()
}
}
private void printDebugData ()
{
int numRows = getRowCount ()
int numCols = getColumnCount ()
for ( int i = 0 i < numRows i++ )
{
System.out.print (" row " + i + ":")
for ( int j = 0 j < numCols j++ )
{
System.out.print (" " + data[i][j])
}
System.out.println ()
}
System.out.println ("--------------------------")
}
}
private static void createAndShowGUI ()
{
JFrame frame = new JFrame ("TableDemo")
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE)
TableDemo newContentPane = new TableDemo ()
newContentPane.setOpaque (true)
frame.setContentPane (newContentPane)
frame.pack ()
frame.setVisible (true)
}
public static void main ( String[] args )
{
javax.swing.SwingUtilities.invokeLater (new Runnable ()
{
public void run ()
{
createAndShowGUI ()
}
})
}
}
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